The Great Dragon in 1.01, fully locked up under Uther's rule
Episode 12 - The Fires of Idirsholas Saturday 12 December 6.05-6.50pm BBC ONE
When the fires of Idirsholas burn for the first time in 300 years, Gaius fears a sorcerer has revived the deadly Knights of Medhir, in the penultimate episode of the magical family drama. Morgause has returned, hell-bent on ending Uther's reign.
Arthur and Merlin ride out to face the Knights and barely escape with their lives. Upon returning home, they find everyone in Camelot is under a strange enchantment – all except for Morgana. Could she be behind the magic which threatens the Kingdom? As Morgause and her Knights...